About: http://webisa.webdatacommons.org/15979649

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	When wastewater is collected in a separator, petroleum products including oil and fuels float to the top, and heavier materials like sand and sludge settle to the bottom.
http://www.w3.org/ns/prov#wasQuotedFrom	umn.edu